[add]: timestamp fix

app/models/customer.py

@@ -3,6 +3,7 @@ from sqlalchemy.orm import relationship
 from app.extensions import db
 from app.models.account import Account
 from sqlalchemy.exc import IntegrityError
+from sqlalchemy.sql import func
 
 class Customer(db.Model):
     __tablename__ = 'customers'
@@ -10,9 +11,8 @@ class Customer(db.Model):
     id = db.Column(db.String(50), primary_key=True) 
     msisdn = db.Column(db.String(20), unique=True, nullable=False)
     country_code = db.Column(db.String(3), nullable=False)
-    created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
-    updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
-
+    created_at = db.Column(db.DateTime(timezone=True), server_default=func.now())
+    updated_at = db.Column(db.DateTime(timezone=True), onupdate=func.now())
     accounts = relationship(
         "Account",
         primaryjoin="Customer.id == Account.customer_id",